Non npp to quad tip conversion exhaust options

Bayville SS · 02-17-2017, 09:30 AM

My Camaro is a non npp from the factory. I already ordered the quad tip rear fascia and now I'm exploring either cat back or axleback quad tip options.
What's out there and what are your thoughts on each?
Video sound clips would be greatly appreciated.
Thanks

Alpha1BC · 02-17-2017, 11:09 AM

I saw that Borla makes some quad tip stuff without the NPP valves, not sure if I've seen any others though. I would think that any system with valves could just be locked into the open position by either a custom bracket or some welding if they don't hold themselves open on their own. The factory NPP system is open by default, but not sure if it's springs on the exhaust or the actuator itself that keep the valves open.

https://www.borla.com/chevy-2016-201...tems/#CamaroV8

I'm also wanting to develop something like that for my car with MRT, just because I like the look of the quad tips better than dual tips. Probably wouldn't happen until this spring when I pull my car out of storage for the winter, though. How soon were you looking to install?

Bayville SS · 02-17-2017, 11:16 AM

Well, the whole idea was to find a system without the valves to save some cash. In not in a huge rush but will do it once I find a system I like. I still have to have the fascia painted and installed as well

cncmotors · 02-17-2017, 01:28 PM

Borla, Kooks, Mbrp, and Corsa have quad axle-back for Non-NPP

Aboynamedsue · 02-17-2017, 01:52 PM

I am ordering Borla Atak on Monday. The non npp version is substantially cheaper than the npp (1,076.99 vs. 1,600.99 from one vendor).

C10_ustacould · 02-17-2017, 03:43 PM

I had the Borla ATAK cat-back on my ZL1 and it was awesome. Loud though, not for the faint of heart... or ear drums.

nukemustang · 02-18-2017, 06:23 AM

Quote:

Originally Posted by Bayville SS

Well, the whole idea was to find a system without the valves to save some cash. In not in a huge rush but will do it once I find a system I like. I still have to have the fascia painted and installed as well

How does the quad tip bumper fascia come btw? Do they need to be painted or are they that black bumpy/textured plastic?

never mind... I found it in another thread.... smooth, primed... just another step to get to quad tips...

MAGAUSA · 02-18-2017, 07:36 AM

Quote:

Originally Posted by Alpha1BC

I saw that Borla makes some quad tip stuff without the NPP valves, not sure if I've seen any others though. I would think that any system with valves could just be locked into the open position by either a custom bracket or some welding if they don't hold themselves open on their own. The factory NPP system is open by default, but not sure if it's springs on the exhaust or the actuator itself that keep the valves open.

https://www.borla.com/chevy-2016-201...tems/#CamaroV8

I'm also wanting to develop something like that for my car with MRT, just because I like the look of the quad tips better than dual tips. Probably wouldn't happen until this spring when I pull my car out of storage for the winter, though. How soon were you looking to install?

It must be vacuum that closes them.

Techn9cian805 · 02-18-2017, 04:45 PM

Quote:

Originally Posted by Alpha1BC

I saw that Borla makes some quad tip stuff without the NPP valves, not sure if I've seen any others though. I would think that any system with valves could just be locked into the open position by either a custom bracket or some welding if they don't hold themselves open on their own. The factory NPP system is open by default, but not sure if it's springs on the exhaust or the actuator itself that keep the valves open.

https://www.borla.com/chevy-2016-201...tems/#CamaroV8

I'm also wanting to develop something like that for my car with MRT, just because I like the look of the quad tips better than dual tips. Probably wouldn't happen until this spring when I pull my car out of storage for the winter, though. How soon were you looking to install?

Its springs that keep it open.

Yellow6thGen · 02-18-2017, 04:49 PM

Quote:

Originally Posted by nukemustang

How does the quad tip bumper fascia come btw? Do they need to be painted or are they that black bumpy/textured plastic?

never mind... I found it in another thread.... smooth, primed... just another step to get to quad tips...

Mine came painted in factory paint and gloss black like on the NPP cars....Dealer installed when they installed my Cat Back MBRP...

MitchSix · 02-21-2017, 10:15 PM

I have the Corsa Extreme axle back on my car, haven't had any second thoughts. Sounds beastly, highly recommend them. Here's a cold start, idle, and revs!
https://youtu.be/Zdr3VqOwyGc

Alpha1BC · 02-22-2017, 09:14 AM

Quote:

Originally Posted by nukemustang

How does the quad tip bumper fascia come btw? Do they need to be painted or are they that black bumpy/textured plastic?

never mind... I found it in another thread.... smooth, primed... just another step to get to quad tips...

Yes, to confirm, the only available part through GM service at the moment for the quad tip rear fascia on the SS is 23404791, comes primer only ready to paint. If it was installed by a dealer, there's a chance that they painted it for you to match the gloss black that comes from the factory. There are 2 different levels of gloss available, so this lets the dealers match whichever gloss you had before when being used as a replacement. Can't order the painted part directly through GM's service department that I know of.

cncmotors · 02-23-2017, 05:52 AM

You can just cut the diffuser for quad. All Camaro ss in South Korea have non-npp system but many owners put quad exhaust with diffuser cuttings!

Hard Parker · 02-23-2017, 06:38 AM

Havent heard too many aftermarket ones but Corsa is never a bad idea

02-17-2017, 09:30 AM	#1
Bayville SS Shop Manager @ Tune Time Drives: 2016 2SS Join Date: Oct 2016 Location: Bayville, NJ Posts: 30	Non npp to quad tip conversion exhaust options My Camaro is a non npp from the factory. I already ordered the quad tip rear fascia and now I'm exploring either cat back or axleback quad tip options. What's out there and what are your thoughts on each? Video sound clips would be greatly appreciated. Thanks

02-17-2017, 11:09 AM	#2
Alpha1BC Drives: 2017 1SS 1LE Join Date: Jun 2016 Location: Detroit, MI Posts: 1,000	I saw that Borla makes some quad tip stuff without the NPP valves, not sure if I've seen any others though. I would think that any system with valves could just be locked into the open position by either a custom bracket or some welding if they don't hold themselves open on their own. The factory NPP system is open by default, but not sure if it's springs on the exhaust or the actuator itself that keep the valves open. https://www.borla.com/chevy-2016-201...tems/#CamaroV8 I'm also wanting to develop something like that for my car with MRT, just because I like the look of the quad tips better than dual tips. Probably wouldn't happen until this spring when I pull my car out of storage for the winter, though. How soon were you looking to install? __________________ 2017 SS 1LE.

02-17-2017, 01:52 PM	#5
Aboynamedsue Drives: 2017 Camaro SS Join Date: Mar 2016 Location: Saint Louis Posts: 346	I am ordering Borla Atak on Monday. The non npp version is substantially cheaper than the npp (1,076.99 vs. 1,600.99 from one vendor). __________________ 2017 SS manual ordered through the one and only Becky! For sale: https://www.camaro6.com/forums/showthread.php?t=612154

02-17-2017, 03:43 PM	#6
C10_ustacould Drives: 2018 ZL1 Garnet Metallic A10 Join Date: Feb 2016 Location: Florida Panhandle Posts: 145	I had the Borla ATAK cat-back on my ZL1 and it was awesome. Loud though, not for the faint of heart... or ear drums. __________________ Buck "I don't anymore, but I ustacould!" 2018 ZL1 Garnet Metallic

02-23-2017, 06:38 AM	#14
Hard Parker Drives: ZL1 Join Date: Sep 2011 Location: Phoenix Posts: 1,524	Havent heard too many aftermarket ones but Corsa is never a bad idea __________________ 2017 Camaro 1LE Nightfall Gray Metallic RIP ☠️☠️☠️ 2017 Camaro ZL1 Black Exposed CF\|Sunroof\|6 Speed Click HERE to follow my build!! Click HERE to follow me on Instagram #savethemanuals

02-17-2017, 11:16 AM	#3
Bayville SS Shop Manager @ Tune Time Drives: 2016 2SS Join Date: Oct 2016 Location: Bayville, NJ Posts: 30	Well, the whole idea was to find a system without the valves to save some cash. In not in a huge rush but will do it once I find a system I like. I still have to have the fascia painted and installed as well

02-17-2017, 01:28 PM	#4
cncmotors Drives: camaro Join Date: Sep 2016 Location: Korea Posts: 191	Borla, Kooks, Mbrp, and Corsa have quad axle-back for Non-NPP

02-21-2017, 10:15 PM	#11
MitchSix Drives: Mosaic Black 2016 Camaro 2SS Join Date: Oct 2016 Location: Connecticut Posts: 16 View My Garage	I have the Corsa Extreme axle back on my car, haven't had any second thoughts. Sounds beastly, highly recommend them. Here's a cold start, idle, and revs! https://youtu.be/Zdr3VqOwyGc

02-23-2017, 05:52 AM	#13
cncmotors Drives: camaro Join Date: Sep 2016 Location: Korea Posts: 191	You can just cut the diffuser for quad. All Camaro ss in South Korea have non-npp system but many owners put quad exhaust with diffuser cuttings!

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